Vietnam’s stock index has risen for a seventh day to the highest level since March 2008, crossing the key 650 level. Khiem Do, the Hong Kong-based head of multi-asset strategy at Baring Asset Management, said last month the stock gauge needed to break out of its 2 1/2 year trading range of between 515 and 641. If it “breaks 650 on good volume, then that would be very bullish for the Vietnamese market.”